At best, the thermal efficiency of geothermal power generation is around 23%-about half that of a coal-fired power station.
电热能发电的热能效率大约至多为23%，只有火电厂的效率的一半。
Current coal production is over 37 million tonnes per year, most of which is used for thermal power generation.
目前煤年产量超过37万吨，主要供热电厂发电之用。
Thermal coal is used for electricity generation in power stations, and coking coal is mixed in furnaces with iron ore to produce steel.
动力煤主要用于电厂发电，而焦煤则投入熔炉中与铁矿石混合用以生产钢筋。
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